19 #ifndef NET_INSTAWEB_REWRITER_PUBLIC_LAZYLOAD_IMAGES_FILTER_H_
20 #define NET_INSTAWEB_REWRITER_PUBLIC_LAZYLOAD_IMAGES_FILTER_H_
25 #include "pagespeed/kernel/base/string.h"
26 #include "pagespeed/kernel/html/html_element.h"
27 #include "pagespeed/kernel/html/html_filter.h"
28 #include "pagespeed/opt/logging/enums.pb.h"
30 namespace net_instaweb {
32 class StaticAssetManager;
78 static const char* kImageLazyloadCode;
79 static const char* kImageOnloadCode;
80 static const char* kLoadAllImages;
81 static const char* kOverrideAttributeFunctions;
82 static const char* kIsLazyloadScriptInsertedPropertyName;
87 virtual const char* Name()
const {
return "Lazyload Images"; }
88 ScriptUsage GetScriptUsage()
const override {
return kWillInjectScripts; }
90 static void InitStats(Statistics* statistics);
91 static void Terminate();
95 static GoogleString GetLazyloadJsSnippet(
100 virtual void StartDocumentImpl();
101 virtual void EndDocument();
102 virtual void StartElementImpl(HtmlElement* element);
103 virtual void EndElementImpl(HtmlElement* element);
104 virtual void DetermineEnabled(GoogleString* disabled_reason);
109 static GoogleString GetBlankImageSrc(
114 void InsertLazyloadJsCode(HtmlElement* element);
118 void InsertOverrideAttributesScript(HtmlElement* element,
119 bool is_before_script);
122 GoogleString blank_image_url_;
125 HtmlElement* skip_rewrite_;
127 HtmlElement* head_element_;
129 bool main_script_inserted_;
134 bool abort_script_inserted_;
137 int num_images_lazily_loaded_;
Definition: common_filter.h:47
Definition: static_asset_manager.h:47
Definition: rewrite_driver.h:98
Definition: lazyload_images_filter.h:76
Definition: rewrite_options.h:84
static RewriterHtmlApplication::Status ShouldApply(RewriteDriver *driver)
Lazyload filter will be no op for the request if ShouldApply returns false.